Blade grinders chop unevenly—fine dust plus boulders—so espresso chokes and French press sludges. Entry burr grinders start near $100 and pay for themselves if you buy whole beans. This guide compares flat vs conical burrs, retention, noise, and which Amazon grinders are worth repairing versus replacing.
Burr basics
Conical burrs common in home grinders; flat burrs appear in prosumer tiers. Adjustments stepped vs stepless: stepped easier for beginners, stepless for espresso dialing. Retention (grams left in chute) matters for single dosing purists.
Recommended tiers
Entry: Baratza Encore / Encore ESP for filter and light espresso. Mid: Oxo Brew Conical Burr, Fellow Ode for filter (espresso burrs sold separately). Budget: Shardor and Cuisinart—acceptable for drip coffee if you accept inconsistency at fine settings.
Maintenance
Grind rice or commercial pellets to clean burrs occasionally. Replace burrs per manufacturer—Baratza supports this. Never grind spices unless dedicated mill.
FAQ
Manual hand grinder? 1Zpresso/JX great for travel; slow for pots.
Static cling? RDT water drop trick on beans controversial—tiny water only if you accept risk.
Espresso? Need true espresso range under ~300 microns—check reviews.